618836278814650 has 48 divisors (see below), whose sum is σ = 1262964908369304. Its totient is φ = 224182199105280.

The previous prime is 618836278814627. The next prime is 618836278814671. The reversal of 618836278814650 is 56418872638816.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 2909954927881 + 615926323886769 = 1705859^2 + 24817863^2 .

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8981624169 + ... + 8981693068.

Almost surely, 2^{618836278814650} is an apocalyptic number.

618836278814650 is an abundant number, since it is smaller than the sum of its proper divisors (644128629554654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618836278814650 is a wasteful number, since it uses less digits than its factorization.

618836278814650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17963317315 (or 17963317310 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 73.

The spelling of 618836278814650 in words is "six hundred eighteen trillion, eight hundred thirty-six billion, two hundred seventy-eight million, eight hundred fourteen thousand, six hundred fifty".